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Allows you to call (execute) a method of an object in the context of a different object (the calling object).
Method of Function
Syntax
call( thisArg[, arg1[, arg2[, ...]]] )
Parameters
| Parameter | Description |
|---|---|
| thisArg | Parameter for the calling object |
| arg1, arg2, ... | Arguments for the object |
Description
You can assign a different this object when calling an existing function. this refers to the current object, the calling object.
With call, you can write a method once and then inherit it in another object, without having to rewrite the method for the new object.
Examples
You can use call to chain constructors for an object, similar to Java. In the following example, the constructor for the product object is defined with two parameters, name and value. Another object, prod_dept, initializes its unique variable (dept) and calls the constructor for product in its constructor to initialize the other variables.